Introduction to Buffer-Helpers

The buffer-helpers library is a robust utility that offers numerous APIs to simplify and enhance buffer data manipulation in Node.js. This indispensable tool can significantly improve your development workflow when working with buffers.

Key APIs with Examples

Create Buffer

Use the createBuffer API to initialize a new buffer.

  const { createBuffer } = require('buffer-helpers');
  const buf = createBuffer('Hello, World!');
  console.log(buf.toString()); // Outputs: Hello, World!

Concat Buffers

Concatenate multiple buffers into one using concatBuffers.

  const { concatBuffers } = require('buffer-helpers');
  const buf1 = Buffer.from('Hello, ');
  const buf2 = Buffer.from('World!');
  const bufConcat = concatBuffers([buf1, buf2]);
  console.log(bufConcat.toString()); // Outputs: Hello, World!

Split Buffer

Split a buffer by a delimiter with splitBuffer.

  const { splitBuffer } = require('buffer-helpers');
  const buf = Buffer.from('Hello, World!');
  const [part1, part2] = splitBuffer(buf, Buffer.from(', '));
  console.log(part1.toString()); // Outputs: Hello
  console.log(part2.toString()); // Outputs: World!

Buffer to Hex

Convert a buffer to a hexadecimal string using bufferToHex.

  const { bufferToHex } = require('buffer-helpers');
  const buf = Buffer.from('Hello, World!');
  const hex = bufferToHex(buf);
  console.log(hex); // Outputs: 48656c6c6f2c20576f726c6421

Hex to Buffer

Convert a hexadecimal string back to a buffer with hexToBuffer.

  const { hexToBuffer } = require('buffer-helpers');
  const hexString = '48656c6c6f2c20576f726c6421';
  const buf = hexToBuffer(hexString);
  console.log(buf.toString()); // Outputs: Hello, World!

Application Example

Let’s see how to build a simple application that reads data from a file, processes the buffer, and then writes it to another file.

  const fs = require('fs');
  const path = require('path');
  const { createBuffer, concatBuffers, bufferToHex, hexToBuffer } = require('buffer-helpers');
  
  // Read data from file
  const inputPath = path.resolve(__dirname, 'input.txt');
  const data = fs.readFileSync(inputPath);
  
  // Process buffer
  const initialBuffer = createBuffer(data.toString());
  const hexString = bufferToHex(initialBuffer);
  const processedBuffer = hexToBuffer(hexString);
  
  // Concatenate a static message
  const message = createBuffer(' This is appended using buffer-helpers.');
  const finalBuffer = concatBuffers([processedBuffer, message]);
  
  // Write to output file
  const outputPath = path.resolve(__dirname, 'output.txt');
  fs.writeFileSync(outputPath, finalBuffer);

With buffer-helpers, you can manipulate buffers effortlessly, making your Node.js application more efficient and easier to maintain.

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